Portable dark room.



A. v. BAJKAY. IORTABLE DARK ROOM.

APPLICATION FILED JAN. 5, 1912.

Patented J '11111111111111111111'InA\\\\\\\\\\\\\ r llllfflllllllllflllll' COLUMBIA PLANQGRAPH cn.,wASHxNuToN. D. c.

. unrrnn srarns rarnnr orrior..

.ALEXANDER v, BAJKAY, or :BU

DAPES'E, AUSTRIA-HUNGARY.

PORTABLE DARK ROOM.

Application led January 5,

To @ZZ whom it may concern:

Be it known that I, ALEXANDER voN BAJKAY, subject of the King of Hungary, residing at Budapest, Austria-Hungary, have invented certain new and useful Improvements in Portable Dark Rooms, of which the following is a specification.

This invention relates to portable dark rooms for photography and has for its object improvements therein whereby the dark room will be of considerable dimensions when in working condition but can fold up for transport and in this stater occupies a comparatively very small space, whereby the improved dark room is particularly valuable to tourists and travelers.

The invention yconsists in an improved dark room having side walls which slide toget-her and can be pulled out, a red glass window, an inspection opening which can be covered over and a pair of openings for the insertion of the hands of the user, which openings are provided on the inside with liap doors and on the outside with removable sleeves.

A casing is provided over an inspection opening in one of the telescopic box-like casings and carries a mask through which the user can clearly view the illuminated interior of the dark room, without the manipulation within the same being interfered with.

One constructional form of the improved dark room is illustrated by way of example in the drawings, in which,

Figure l is a transverse vertical sectional view of the improved dark room, showing the latter' in extended or working condition, Fig. 2 is a similar sectional view, showing the dark room in folded condition, both sections being taken substantially centrally of the dark room. Fig. 3 is a front elevational View of Fig. 1, with the front doors removed. Figs. t and 5 are details showing the manner in which the removable sleeves can be adapted to the openings for the insertion of the hands.

ln the back wall of the box a is inserted a pane Z) of red glass and the front wall consists of two parts or doors c, CZ, of which the upper door c can be folded back like a door as shown and the door Z swung down to lie on a level with the bottom of the box. Within the box is a second pyramid shaped box e, the back wall of which is of breadth equal to the inside breadth of the box a and can be folded backward about its lower edge.

Specification 'of Letters Patent.

Patented July 16, 1912.

1912. Serial No. 669,636.

Along' the front edges of the inside of the sides of the box are attached strips g, the box e being provided along its back edges with similar strips h. so that the box e, after the doors c, Z of box a have been opened, may be withdrawn from the latter until the strips ZL encounter the strips g, when the back wall f of the box e can be laid on the bottom of the box a (see Fig. l). rlhe box e is held fast in this position, pulling out of the said box e being prevented by the strips g and pushing in by the side f abut-ting against the back Awall of the box a. The inside walls of both boxes are blackened.

The sloping cover plate of the box e has an opening z' in which is fixed a protecting` cap Ze of frusto-pyramid shape, without bottom or cover. The opening e' is covered by a plate Z hinged to the lower edge of the cap 7c which plate is held in closed position by a suitable spring fastener my at the upper edge of the pyramid section.

rlhe two side walls of the box e are provided with openings n closed by inwardly folding doors o. ln line with these openings n are arranged rings u or u', fixed to the said side walls as shown in Figs. l and 5, which rings are designed to be; frictionally engaged by annular shells carried by sleeves o. lWhen it is desired to work in the darkroom, prepared as illustrated in Fig. l the user puts on a mask attached to a frusto-pyramidal cap 7) which fits over the cap 7c, pushes his hands through the sleeves o, attaches the shells to the rings a or u by fitting said the doors 0 inward and allows the plate Z to drop down about its hinge, thereby making it possible to look into the room and work with his hands therein. Red light now shines into the room. Then the work is not done by daylight, any suitable source of lightis placed in front of the window l) and the odor cannot penetrate into the room as with internal lamps.

The back wall r of the box a is hinged at its lower edge to the bottom plate and may be detachably connected at its upper edge to the roof of the box in any suitable manner. To place the plates to be developed into the room, the wall r is opened and the plates placed in the room through the opening thus produced, and the wall r closed again. Vllhen the work is finished the wall r is opened, the wall f brought into the vertical and the box e pushed inward. The front and back walls of the box a are closed, whereupon the entire device may be easily carried by means of the handle s. The room is shown in this condition in Fig. 2, the cap and plate z' being omitted for clearness of illustration. lThe usual photographic utensils may obviously be arranged in the dark room itself.

As will be clearly evident, the space oecupied by the improved dark room when arranged for transport is very small, whereas in working condition considerable room is available for the operations, which render the apparatus exceedingly useful to tourists.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed I declare that what l claim is:

l. A portable dark room comprising an outer box having a front member adapted to be opened and closed, an inner box telescopically arranged wit-hin the outer box and adapted to be moved bodily out of and into the same when said front member is open, and cooperating devices attached to said outer and inner boxes for limiting the outward movement of said inner box.

2. A portable dark room comprising an outer box having a front member adapted to be opened and closed, an inner box telescopically arranged within the outer box and adapted to be moved bodily out of and into the same when said front member is open, stops secured to the inner faces of the sides 03E said outer box at the front edges thereof, and stops secured to the outer faces of the sides of said inner box at the rear edges thereof for engagement wit-h the lirstnamed stops, to limit the outward movement of said inner box.

3. A portable dark room comprising an outer box having a front member adapted to be opened and closed, an inner box telescopieally arranged within the outer box and adapted to be moved bodily into and out of the same when said front member is open, cooperating devices attached to said outer and inner boxes for limiting the outward move-ment of said inner box, and a member connected to said inner box and arranged to engage the rear member of said outer box for normally preventing inward movementor' said inner box when the latter is at the limit of its outward movement.

4. A portable darli room comprising an outer box having a front member adapted to be opened and closed, an inner box telescopically arranged within the outer box and adapted to be moved bodily out of and into the same when said front member is open, coopera ting means provided upon said outer and inner boxes for limiting the outward movement oit said inner box, and means carried by said inner box for normally preventing inward movement of said inner box when the latter is at the limit ol its inward movement.

5. A portable dark room comprising an outer box having a front member adapted to be opened and closed and consisting of a plurality of movable sections one ot which is adapted to be moved into the plane of the bottom member of the said box and an inner box telescopically arranged within the outer box and adapted to be moved bodily along said bottom member and said section out of and into the outer box when said front member is open, said inner box having hinged to its bottom member a rear member, which is adapted to overlie the lirst-named bottom member when said inner box has been moved into its outward position and to engage the rear member of said outer box, to normally prevent displacement of said inner box tromsuch position,

G. A portable dark room having an inner box whose front wall comprises an upper inclined section and a vertical lower section, said upper section being provided with a sight opening and whose side walls are provided with a pair of hand openings, a pair of rings fixed to said lower section in line with said hand openings, a. pair oli' annular shells frictionally engaged with said rings, and a pair of flexible sleeves to which said shells are secured.

7. A portable dark room having an inner box whose front wall comprises an upper inclined section and a vertical lower section, said upper section being provided with a sight opening, and whose side walls are provided with a pair of hand openings, an openended cap fixed in the sight opening', a mov able opaque plate normally covering said sight opening'7 a cap removably litted upon the lirst-named cap and provided with a mask, a pair ot rings lixed to said lower section in line with said hand openings, an annular shell frictionally engaged with each ring, and a pair of flexible sleeves to which said shells are secured.

8. A portable dark room comprising an outer box having a front member adapted to be opened and closed, an inner box telescopically arranged within the outer box and adapted to be moved bodily out of and into the same when said front member is open, the front member ot said inner box being formed with a sight opening and a pair of hand openings, and a pair oit' flexible sleeves removably connected with the second-named front member in line with the hand openings.

9. A portable dark room comprising an outer box having a front memberl adapted to be opened and closed, an inner box telescopically arranged within the outer box and adapted to be moved bodily out of and into the same when said front member is open, the front member of said inner box being formed With a sight openingand a pair of hand openings, a pair of hinged doors ar ranged Within said inner box in position to normally Close said hand openings, and a pair of flexible sleeves Connected with the second-named front member in line with said hand openings.

In testimony whereof I affix my signature 1n presence of two Witnesses.

ALEXANDER v. BAJKAY.

Witnesses:

NEUFELD ARMIN, JOHN J. ROUTE.

Copies of this patent may` be obtained for ive cents each, by addressing the Commissioner of Patents,

Washington, D. G.l 

